I was told, the way to test any dish (glass, plastic, etc.) is to put the dish or tray in the microwave with no food or water in it, turn on the microwave for a minute or two, and if the item is warm to the touch, it should not be used. Some older Corningware should not be used as it gets hot to the touch all by itself.
_____ From: blindhandyman@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of chiliblindman Sent: Thursday, December 04, 2008 8:24 AM To: blindhandyman@yahoogroups.com Subject: Re: [BlindHandyMan] microwave glass It is just good heavy glass that makes clean-up easy. Any glass that takes heat will work fine. Most things now list that they are microwavable. I use corningware all the time. No metal since it will destroy the megatron tube that produces the microwave. I do hope you have a most wonderful day. ..............bob [Non-text portions of this message have been removed] [Non-text portions of this message have been removed]